Compare Cannabis Seed Banks & Breeders

Spain (founded) / Spain (current HQ)

Advanced Seeds

Advanced Seeds is a renowned Spanish cannabis seed bank based in Murcia, dedicated to producing high-quality, stable, and pure genetics. Founded in 1999 by a group of breeders returning from the Netherlands, they specialize in robust, feminised, and autoflowering strains that blend premium Dutch, Spanish, and USA genetics.

Available genetics12 shown

Afghan SkunkFeminised€8.50THC 15.00%70 daysAfghan SkunkFeminised€8.50THC 17.00%60 daysAmnesia FASTFeminised€8.50THC 18.00%70 daysAmnesia XXLFeminised€8.50THC 14.00%80 daysAnimal ZookiesFeminised€8.50THC 28.00%65 daysApple FritterFeminised€8.50THC 25.00%60 daysBanana CookiesFeminised€8.50THC 24.00%70 daysBiodiesel Mass XXLFeminised€8.50THC 17.00%70 daysBlue DieselFeminised€9.50THC 16.00%60 daysBruce BannerFeminised€8.00THC 24.00%65 daysBruce Banner XXLFeminised€8.50THC 25.00%75 daysCriticalFeminised€8.50THC 16.00%60 days

23 strains Explore Advanced Seeds →

UK (founded) / UK (current HQ)

Big Head Seeds

Big Head Seeds is a premium cannabis seed bank that has been collecting and refining global marijuana genetics since the 1990s. Operating for over two decades, the brand is widely known for developing stable, high-yielding, and aromatic hybrids with exclusive US genetics.

Available genetics12 shown

Banana PunchFeminised€50.00THC 26.00%65 daysBruce Banner #3Feminised€50.00THC 30.00%70 daysChemdawg #4Feminised€55.00THC 25.00%65 daysCookie DawgFeminised€53.00THC 20.00%63 daysCrystal GelatoFeminised€55.00THC 25.00%65 daysCRYSTAL GELATO AUTOFeminised€44.00THC 22.00%63 daysCrystal RuntzFeminised€60.00THC 27.00%65 daysDO-Si-DOSFeminised€58.00THC 30.00%63 daysDogstar DawgFeminised€49.00THC 24.00%70 daysDogstar Dawg AutoFeminised€49.00THC 24.00%70 daysFIRE OG KUSHFeminised€49.00THC 24.00%63 daysGIRL SCOUT COOKIESFeminised€53.00THC 25.00%63 days

23 strains Explore Big Head Seeds →

UK (founded) / Spain (current HQ)

Black Skull Seeds

Founded by a collective of seasoned UK growers who relocated to Spain in the early 2000s, Black Skull Seeds was established with a singular mission: to breed elite cannabis strains that drastically reduce flowering time while maximizing yield, flavor, and cannabinoid profile. Recognizing that many classic photoperiod and traditional autoflowering varieties require long cultivation cycles or sacrifice potency for speed, Black Skull Seeds spent years refining and stabilizing genetics to bridge that gap. By crossing top-tier European and West Coast strains with robust autoflowering lines, they have developed a catalog renowned for rapid turnaround, strong resistance, and consistently high THC content. Whether producing heavy-hitting autoflowers like Gorilla Auto and Jack Herer Auto or stable, high-yielding feminized photo strains, Black Skull Seeds remains a trusted choice for both novice growers looking for an easy, forgiving crop and commercial cultivators seeking maximum efficiency per cycle.

Available genetics12 shown

Auto GelatoFeminised€21.0085 daysAuto Pineapple GumFeminised€18.00THC 18.24%65 daysAuto ZkittlezFeminised€21.00THC 20.00%70 daysBruce BannerFeminised€21.00THC 29.00%70 daysBubble BudFeminised€18.00THC 20.00%60 daysCritical RyderFeminised€18.00THC 22.00%65 daysDiesel-MaticFeminised€18.00THC 24.00%65 daysFive-OFeminised€18.00THC 24.00%63 daysFruity PebblesFeminised€21.00THC 19.00%65 daysGelatoFeminised€21.00THC 25.00%63 daysGirl Scout CookiesFeminised€21.00THC 29.00%70 daysGorilla GlueFeminised€21.00THC 30.00%63 days

22 strains Explore Black Skull Seeds →

UK (founded) / USA (current HQ)

Top Shelf Elite

Founded in 2012 by an elite group of veteran international breeders, Top Shelf Elite was established with a singular objective: craft breath-taking, commercial-grade cannabis hybrids that deserve a place on the top shelf of the world’s finest dispensaries. Operating in close partnership with leading European collectives (including Critical Mass Collective), the brand bridges classic old-school European genetics with cutting-edge American West Coast lines. Top Shelf Elite’s breeding framework centers on selecting rare, private-reserve mother clones known for exceptional vigor, high mold resistance, extreme THC potency, and heavy resin output suited for extractors. By pairing these heritage cultivars with modern California candy, gas, and dessert strains, the collective creates stable, fast-flowering varieties with loud, complex terpene profiles. Their recognized catalog features high-yield bestsellers and modern classics such as Gorillagasm, San Francisco Sour Dough, Nightcrawler OG, Black Valium, Auto Cookie Breath, Auto Apple Wreck, and Truffle Berry. Available in photoperiod feminized and rapid autoflowering lines, Top Shelf Elite remains a go-to choice for commercial operators, extract artists, and home growers seeking modern dispensary-grade genetics.

Available genetics12 shown

Auto Black ValiumFeminised€15.00THC 20.00%56 daysBlack ValiumFeminised€15.00THC 20.00%56 daysBlueberry Sugar PineFeminised€14.00THC 20.00%70 daysBlueberry Sugar PineFeminised€15.00THC 20.00%70 daysGlue DreamFeminised€15.00THC 20.00%77 daysGlue DreamFeminised€15.00THC 20.00%70 daysGorillagasmFeminised€15.00THC 25.00%60 daysGorillagasmFeminised€15.00THC 25.00%60 daysGucci DreamsFeminised€15.00THC 20.00%63 daysGucci DreamsFeminised€15.00THC 23.00%65 daysMoon FruitFeminised€15.00THC 22.00%70 daysMoon FruitFeminised€15.00THC 22.00%56 days

19 strains Explore Top Shelf Elite →

Netherlands (founded) / Amsterdam (current HQ)

Green House Seeds

Established in Amsterdam, Green House Seed Co. is an undisputed titan of global cannabis breeding. Founder Arjan Roskam began cultivating exotic landrace sativas and breeding pioneering genetics in the mid-1980s before opening the first Green House Coffee Shop in 1992 and establishing the official seed bank shortly after. With over 40 High Times Cannabis Cups and dozens of Highlife awards to its name, Green House Seed Co. shaped the modern cannabis landscape. The company is credited with popularizing some of the world's most influential genetics—including the famous "White" family (White Widow, White Rhino) and legendary Hazes (Super Silver Haze, Super Lemon Haze, Hawaiian Snow). Beyond seed production, Green House Co. expanded its impact on global cannabis culture through the famous Strain Hunters initiative—expeditions led by Roskam and the late Franco Loja to preserve, collect, and document rare landrace strains from remote corners of the globe. Today, Green House Seed Co. offers a diverse catalog of feminized, autoflowering, and CBD-rich seeds backed by decades of proven breeding mastery.

Available genetics12 shown

A.M.S.Feminised€10.00THC 19.05%63 daysAlienZFeminised€14.00THC 24.30%70 daysAmnesiaFeminised€12.00THC 25.00%70 daysArjan Strawberry HazeFeminised€10.00THC 24.00%70 daysArjan’s Haze #3Feminised€9.00THC 20.29%70 daysArjan’s Ultra Haze #1Feminised€30.00THC 21.60%98 daysArjan’s Ultra Haze #2Feminised€9.00THC 22.90%91 daysBanana KrumbleFeminised€13.00THC 24.78%63 daysBlack ToffeeFeminised€14.00THC 21.50%56 daysBubba KushFeminised€11.00THC 22.00%63 daysExodus CheeseFeminised€10.00THC 24.00%49 daysExodus CheeseFeminised€10.00THC 26.00%56 days

14 strains Explore Green House Seeds →

Spain (founded)

Short Stuff

Founded by a passionate collective of veteran growers active since the 1990s, Short Stuff Seedbank operates out of Spain with a singular, dedicated focus: mastering and elevating autoflowering cannabis genetics. Following Joint Doctor’s mid-2000s release of the original Lowryder, the team recognized the revolutionary potential of Cannabis ruderalis hybridizations that flower rapidly regardless of light cycles. Short Stuff began extensive selection and backcrossing programs using top-tier Lowryder specimens to overcome early autoflower limitations such as low yield and reduced potency. The breakthrough came with their flagship release, Short Stuff No. 1, which established a robust base for future breeding projects. Partnering with renown autoflower specialists like Breeder Stitch (pioneer of "Super Autos"), Short Stuff expanded its catalog beyond dwarf varieties into tall, heavy-yielding automatic giants. Their recognized catalog includes standout bestsellers and strain milestones such as Short Stuff No. 1, Snowryder, Dr. Feelgood, Mazar Automatic, Super Cali Haze, and Auto Assassin. Offering both regular and feminized automatic seeds engineered for fast harvest turnarounds, heavy resin output, and strong pest resistance, Short Stuff Seedbank remains a trusted global reference point for modern autoflower cultivation.

Available genetics12 shown

Amnesia CBDFeminised€46.00THC 8.00%77 daysAssassinFeminised€46.0070 daysAssassinFeminised€46.00THC 20.00%70 daysBig GunFeminised€36.0060 daysBud CannonFeminised€36.0063 daysDr FeelgoodRegular€43.00THC 25.00%63 daysGorilla OGFeminised€46.00THC 24.00%77 daysJedi KushFeminised€46.00THC 19.00%70 daysOnyxFeminised€32.00THC 24.00%70 daysPurple AmnesiaFeminised€36.00THC 24.00%63 daysSpanish DieselFeminised€36.00THC 18.00%84 daysYetiFeminised€36.0063 days

12 strains Explore Short Stuff →